Bag



Apfil 12, 1932; w ss u N Q 1,853,105

BAG

2 Sheets-Sheet l Filed June 12, 1929 Patented Apr. 12, 1932. I

untrue STA-TES- PATENT OFFICE men 'W EISSHUHN, OF TBOPPAU, QZECHOSLOVAKIA, ASSIGNOB TO I. L. smn'rn do ('10.,

, 01 NEW YORK, K. Y A CORPORATION 01' NEW JERSEY Application filed June 12, 1829, Serial No. 870,266, and in Germany July 7, 1928.

The invention relates to the manufacture of bags, of pa er or other suitable material,

either single p y or. multiple ply, such as those bers inwardly against the side members, and

is finally folding t e two side members inwardly one upon the other and upon the end mem-v bars, the contacting surfaces being secured together by an adhesive. Bags of this type have long been known and it has also been to known, in the case of multiple ply bags, de-

signed to receive pulverulent material, that it has been dificult, without the exercise of.

extraordinary care in applying the adhesive to make such bags entirely dust proof at the;

'85 points where the lines of fold of the side members inwardly, one upon the other, meet .the lines of fold of the end members. It is the primary object of the present invention to strengthen such bags and to render them more certainly dust proof without reniring special care in the application of t ieadnesive. A further object has been to effect an economy in the amount of material used in the formation of such bags.

Inthe accompanying drawings in which the invention is illustrated- Fi re 1 is a view in elevation of a unit lengt of a tube of material adapted for the formation of a bag, the lines of folding for .the formation of an ordinary satchel-bottom bag being indicated by broken lines.

. igure 2 is a similar view of the ordinary satchel-bottom bag in which the preliminary folding of the bag at one end is illustrated and in which the other end is shown as completely formed and turned up against the side of the bag.

Fi ure 3 is a view similar to Figure 2, but

showing 80 pletely forms in accordance with the presfeature by shaded portions.

a ba -having the lower end com-' ent invention and the upper end as partially iformed, also in accordance with the invenion.

Figure 4 is a view similar to Figure 1, but illustrating not only the lines of folding of each end or bottom of the bag in accordance with the invention, but the feature of economy of material, the lines of folding being indicated by broken lines and the economy Figure 5 is a detail view on a larger scale of one end or bottom of a bag partly folded in accordance with the invention.

Figure 6 is a detail view on a still larger scale of one end or bottom of albag completed in accordance with the invention.

Figures 7 ,8 and 9 are detail views in perspective and on a larger scale illustratin more clearly the successive operations 0 I folding in forming one end of the top or bottom of a bag in accordance with the invention'.

In order that the invention may be more readily understood, it will be desirable to describe first and briefly, by reference to Figures 1 and 2, the formation of the well known satchel-bottom bag from a tube of paper or other material formed in any suitable manner. Assuming that the unit tube is flattened, with opposite sides in contact, the side members a a of each end or bottom are folded outwardly from each other upon a common line, indicated at 6 b the end members a, a being at the same time folded inwardly upon the lines 6 b and b b. The side members, al a with the end members a a-, are then folded inwardly, one upon the other, on the lines b, b. In Figure 2 the side member a nearer the eye of the observer is shown as folded down flat against the body of the bag and the other side member a is shown as folded down upon the first side member. After this the first side member a is folded over upon the second side member o The contacting surfaces, except as herein explained, are coated with an adhesive, so that they shall adhere closely together in the completed bag. Bags of this type are commonly formed as valve bags in which the contacting surfaces at one end of the closure,

7 filling openin is provided at one end of the top only of the bag, the bottom being completely closed at both ends. A rectangular strip or stay, indicated by broken lines at c, in Figure 2, is commonly applied with adhesive upon the folded end of the bag when the folding has been completed for the purpose of more stron ly securing togetherthe parts of the satchel bottom.

Unless great care, inconsistent with economy, in manufacture, is exercised in applying.the adhesive and pressing the arts together, unsealed channels are left a on the lines I), b and b', b 'through which lea age of the pulverulent material takes place. It is the principal object of the present invention to so construct the bag as to prevent such leakage without requiring the exercise of special care in sealin the bag.

In the pro uction of the improved bag for the urpose of effecting an economy in the materia used, the tube a, from which successive unit lengths are cut to form successive bags, is cut obliquely, as indicated by the lines a, a in Figures 4, 5 and 6, the end of one bag being matched against the adjacent end of the next ba In this manner, as indicated by the hate ed rtions' a of Figure 4, a saving of about 4 0 of the material used for each bag is effected while, as will ap ear more clearl hereinafter, the strength an security of the bag are in nowise decreased. The foldin of the ends of the bag in accordance with the invention is effected in the same manner whether the ends of each bag unit are cut off obliquely or not. It will also be understood that a valved fillin opening d, such as that already described with reference to the old type of satchel-bottom bag, is provided at one end (the left-hand endin Figure 6) of the top of the bag by folding in the manner already described'and omitting the adhesive, the formation of the bag in accordance with the invention being applied onl atthe other end of the top of the ba an at the two ends of the lower end of the a In the formation of the improvetf bag the two side members a a of the end or bottom of the bag are first folded outwardliy from a common line b 6 as already escribed with reference to Figures 1 and 2. The two end members a", a are folded inwardly on the lines I), b and b, b (Figure 5') One side member a is folded inwardly on the line 6 ,1), but in accordance with the present invention the portion of the end member a adjacent or corresponding to the line b i on the line b, b", which is inclin side member a, instead of be' folded over upon itself with the side mem r a on the line b, b, parallel with the line b, b, is folded over on itself in one direction on the b (Figure 7), from a median point b ill-tile line b, the line I, b being inclined outwardly toward the outer edge of the side member, and is folded over in the other direction from the same median point -b against the side member a on the line b, b, inclined inwardly toward the median line b, b. Then the second side member a is folded inwardly on the line b, b (Figure 6) and the corresponding rtion of the and member is at the same time folded in one direction from a median oint b inJthe line b, B, on the line b, b igure 7), which is inclined inwardl b, b, and is f0 ded in the other direction from the same median point b, u n itself,

1y toward the outer ed of the side member a. The last mentioned portion of the end member is thus folded over against both side members. The folding of the end member in,the manner described causes the side member a to overlap the end member -and the other side member to an extent greater than would be the case ifthe end member were folded only on the lines b, b, as will-be seen bly comparison of the lower end ofthe bag s own in Figure 3 with the lower end of the bag of ordinary construction shown in Figure 2. This folding stifiens the corner of the ba preventing it from being forced out ward y the contents and more efiectually prevents escape of the material by affording greater areas of contact surfaces,

All of the contacting surfaces are coated with adhesive and thereby secured to ther and a rectangular strip or stay, in cated by broken lines o in Figure 6, is a a ready described with reference to gure 2- Finally, all members may be further secured to ether by wire staples, as indicated at a in igure 6, it being understood that where a valve opening is to be provided, as indicated at the left hand in Figures 5 and 6, the and member is not folded upon itself as above described but is folded as. previously described with reference to Fi re 1.

I claim as my invention:

1. A satchel-bottom bag formed from a tube of material and havmg the side mem bers of the bottom folded outwardl from a common line, as at b, b, and each si e member folded inwardly, as on the lines 6', b, the end memberva bein folded toward the side member, as on the ines b, b, and the portion of the end member adjacent to each side member bein folded in op osite directions from a me ian point, as b, in the lines I), b, on lines 6, b and b, b inclined outwardly toward the outer ed of the respective side members and,-from same lied as.

toward the median hne outwardmedian points, on the lines 6", b and b, b

inclined toward the common line, the contasting portions being secured together.

2 A satchel-bottom bag formed from a tube of material cut at its ends at oblique angles in 'o posite directions and having the side members folded outwardly from a common line, as at b, b, and each side member folded inwardly, as on the lines 6, b, the end member a being folded toward the side members, as on the lines bflb and the portion of the end member adjacent to .each side member being folded in opposite directions from a median point b, b", in the lines b b,'on lines 6, b" and b", b inclined outwardly t0- ward the outer edge of the res ective side members and, from the same me ian points, on the lines I)", b and b?, b inclmed toward the common line, the contacting portions being secured together.

In testimony whereofI have aflixed my signature.

ERNST WEISSHUHN. 

